Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/Foundation/include/Poco/AccessExpireStrategy.h

@@ -0,0 +1,74 @@
+//
+// AccessExpireStrategy.h
+//
+// Library: Foundation
+// Package: Cache
+// Module:  AccessExpireStrategy
+//
+// Definition of the AccessExpireStrategy class.
+//
+// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_AccessExpireStrategy_INCLUDED
+#define Foundation_AccessExpireStrategy_INCLUDED
+
+
+#include "Poco/KeyValueArgs.h"
+#include "Poco/ValidArgs.h"
+#include "Poco/ExpireStrategy.h"
+#include "Poco/Bugcheck.h"
+#include "Poco/Timestamp.h"
+#include "Poco/EventArgs.h"
+#include <set>
+#include <map>
+
+
+namespace Poco {
+
+
+template <
+	class TKey,
+	class TValue
+>
+class AccessExpireStrategy: public ExpireStrategy<TKey, TValue>
+	/// An AccessExpireStrategy implements time and access based expiration of cache entries
+{
+public:
+	AccessExpireStrategy(Timestamp::TimeDiff expireTimeInMilliSec): ExpireStrategy<TKey, TValue>(expireTimeInMilliSec)
+		/// Create an expire strategy. Note that the smallest allowed caching time is 25ms.
+		/// Anything lower than that is not useful with current operating systems.
+	{
+	}
+
+	~AccessExpireStrategy()
+	{
+	}
+
+	void onGet(const void*, const TKey& key)
+	{
+		// get triggers an update to the expiration time
+		typename ExpireStrategy<TKey, TValue>::Iterator it = this->_keys.find(key);
+		if (it != this->_keys.end())
+		{
+			if (!it->second->first.isElapsed(this->_expireTime)) // don't extend if already expired
+			{
+				this->_keyIndex.erase(it->second);
+				Timestamp now;
+				typename ExpireStrategy<TKey, TValue>::IndexIterator itIdx =
+					this->_keyIndex.insert(typename ExpireStrategy<TKey, TValue>::TimeIndex::value_type(now, key));
+				it->second = itIdx;
+			}
+		}
+	}
+};
+
+
+} // namespace Poco
+
+
+#endif // Foundation_AccessExpireStrategy_INCLUDED